mirror of
https://github.com/netsurf-browser/netsurf
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644 lines
22 KiB
Objective-C
644 lines
22 KiB
Objective-C
//
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// PSMTabBarController.m
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// PSMTabBarControl
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//
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// Created by Kent Sutherland on 11/24/06.
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// Copyright 2006 Kent Sutherland. All rights reserved.
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//
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#import "PSMTabBarController.h"
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#import "PSMTabBarControl.h"
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#import "PSMTabBarCell.h"
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#import "PSMTabStyle.h"
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#import "NSString_AITruncation.h"
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#define MAX_OVERFLOW_MENUITEM_TITLE_LENGTH 60
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@interface PSMTabBarController (Private)
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- (NSArray *)_generateWidthsFromCells:(NSArray *)cells;
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- (void)_setupCells:(NSArray *)cells withWidths:(NSArray *)widths;
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@end
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@implementation PSMTabBarController
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/*!
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@method initWithTabBarControl:
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@abstract Creates a new PSMTabBarController instance.
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@discussion Creates a new PSMTabBarController for controlling a PSMTabBarControl. Should only be called by
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PSMTabBarControl.
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@param A PSMTabBarControl.
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@returns A newly created PSMTabBarController instance.
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*/
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- (id)initWithTabBarControl:(PSMTabBarControl *)control {
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if((self = [super init])) {
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_control = control;
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_cellTrackingRects = [[NSMutableArray alloc] init];
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_closeButtonTrackingRects = [[NSMutableArray alloc] init];
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_cellFrames = [[NSMutableArray alloc] init];
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_addButtonRect = NSZeroRect;
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}
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return self;
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}
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- (void)dealloc {
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[_cellTrackingRects release];
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[_closeButtonTrackingRects release];
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[_cellFrames release];
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[super dealloc];
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}
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/*!
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@method addButtonRect
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@abstract Returns the position for the add tab button.
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@discussion Returns the position for the add tab button.
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@returns The rect for the add button rect.
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*/
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- (NSRect)addButtonRect {
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return _addButtonRect;
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}
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/*!
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@method overflowMenu
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@abstract Returns current overflow menu or nil if there is none.
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@discussion Returns current overflow menu or nil if there is none.
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@returns The current overflow menu.
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*/
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- (NSMenu *)overflowMenu {
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return _overflowMenu;
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}
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/*!
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@method cellTrackingRectAtIndex:
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@abstract Returns the rect for the tracking rect at the requested index.
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@discussion Returns the rect for the tracking rect at the requested index.
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@param Index of a cell.
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@returns The tracking rect of the cell at the requested index.
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*/
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- (NSRect)cellTrackingRectAtIndex:(NSUInteger)index {
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NSRect rect;
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if(index < [_cellTrackingRects count]) {
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rect = [[_cellTrackingRects objectAtIndex:index] rectValue];
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} else {
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NSLog(@"cellTrackingRectAtIndex: Invalid index (%ld)", (long)index);
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rect = NSZeroRect;
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}
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return rect;
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}
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/*!
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@method closeButtonTrackingRectAtIndex:
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@abstract Returns the tracking rect for the close button at the requested index.
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@discussion Returns the tracking rect for the close button at the requested index.
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@param Index of a cell.
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@returns The close button tracking rect of the cell at the requested index.
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*/
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- (NSRect)closeButtonTrackingRectAtIndex:(NSUInteger)index {
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NSRect rect;
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if(index < [_closeButtonTrackingRects count]) {
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rect = [[_closeButtonTrackingRects objectAtIndex:index] rectValue];
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} else {
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NSLog(@"closeButtonTrackingRectAtIndex: Invalid index (%ld)", (long)index);
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rect = NSZeroRect;
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}
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return rect;
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}
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/*!
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@method cellFrameAtIndex:
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@abstract Returns the frame for the cell at the requested index.
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@discussion Returns the frame for the cell at the requested index.
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@param Index of a cell.
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@returns The frame of the cell at the requested index.
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*/
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- (NSRect)cellFrameAtIndex:(NSUInteger)index {
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NSRect rect;
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if(index < [_cellFrames count]) {
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rect = [[_cellFrames objectAtIndex:index] rectValue];
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} else {
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NSLog(@"cellFrameAtIndex: Invalid index (%ld)", (long)index);
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rect = NSZeroRect;
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}
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return rect;
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}
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/*!
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@method setSelectedCell:
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@abstract Changes the cell states so the given cell is the currently selected cell.
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@discussion Makes the given cell the active cell and properly recalculates the tab states for surrounding cells.
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@param An instance of PSMTabBarCell to make active.
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*/
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- (void)setSelectedCell:(PSMTabBarCell *)cell {
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NSArray *cells = [_control cells];
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NSEnumerator *enumerator = [cells objectEnumerator];
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PSMTabBarCell *lastCell = nil, *nextCell;
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//deselect the previously selected tab
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while((nextCell = [enumerator nextObject]) && ([nextCell state] == NSOffState)) {
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lastCell = nextCell;
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}
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[nextCell setState:NSOffState];
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[nextCell setTabState:PSMTab_PositionMiddleMask];
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if(lastCell && lastCell != [_control lastVisibleTab]) {
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[lastCell setTabState:~[lastCell tabState] & PSMTab_RightIsSelectedMask];
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}
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if((nextCell = [enumerator nextObject])) {
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[nextCell setTabState:~[lastCell tabState] & PSMTab_LeftIsSelectedMask];
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}
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[cell setState:NSOnState];
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[cell setTabState:PSMTab_SelectedMask];
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if(![cell isInOverflowMenu]) {
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NSUInteger cellIndex = [cells indexOfObject:cell];
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if(cellIndex > 0) {
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nextCell = [cells objectAtIndex:cellIndex - 1];
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[nextCell setTabState:[nextCell tabState] | PSMTab_RightIsSelectedMask];
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}
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if(cellIndex < [cells count] - 1) {
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nextCell = [cells objectAtIndex:cellIndex + 1];
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[nextCell setTabState:[nextCell tabState] | PSMTab_LeftIsSelectedMask];
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}
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}
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}
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/*!
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@method layoutCells
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@abstract Recalculates cell positions and states.
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@discussion This method calculates the proper frame, tabState and overflow menu status for all cells in the
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tab bar control.
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*/
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- (void)layoutCells {
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NSArray *cells = [_control cells];
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NSInteger cellCount = [cells count];
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// make sure all of our tabs are accounted for before updating
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if([[_control tabView] numberOfTabViewItems] != cellCount) {
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return;
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}
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[_cellTrackingRects removeAllObjects];
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[_closeButtonTrackingRects removeAllObjects];
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[_cellFrames removeAllObjects];
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NSArray *cellWidths = [self _generateWidthsFromCells:cells];
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[self _setupCells:cells withWidths:cellWidths];
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//set up the rect from the add tab button
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_addButtonRect = [_control genericCellRect];
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_addButtonRect.size = [[_control addTabButton] frame].size;
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if([_control orientation] == PSMTabBarHorizontalOrientation) {
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_addButtonRect.origin.y = MARGIN_Y;
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_addButtonRect.origin.x += [[cellWidths valueForKeyPath:@"@sum.floatValue"] doubleValue] + 2;
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} else {
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_addButtonRect.origin.x = 0;
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_addButtonRect.origin.y = [[cellWidths lastObject] doubleValue];
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}
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}
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/*!
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* @method _shrinkWidths:towardMinimum:withAvailableWidth:
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* @abstract Decreases widths in an array toward a minimum until they fit within availableWidth, if possible
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* @param An array of NSNumbers
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* @param The target minimum
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* @param The maximum available width
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* @returns The amount by which the total array width was shrunk
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*/
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- (NSInteger)_shrinkWidths:(NSMutableArray *)newWidths towardMinimum:(NSInteger)minimum withAvailableWidth:(CGFloat)availableWidth {
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BOOL changed = NO;
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NSInteger count = [newWidths count];
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NSInteger totalWidths = [[newWidths valueForKeyPath:@"@sum.intValue"] integerValue];
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NSInteger originalTotalWidths = totalWidths;
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do {
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changed = NO;
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for(NSInteger q = (count - 1); q >= 0; q--) {
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CGFloat cellWidth = [[newWidths objectAtIndex:q] doubleValue];
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if(cellWidth - 1 >= minimum) {
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cellWidth--;
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totalWidths--;
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[newWidths replaceObjectAtIndex:q
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withObject:[NSNumber numberWithDouble:cellWidth]];
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changed = YES;
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}
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}
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} while(changed && (totalWidths > availableWidth));
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return(originalTotalWidths - totalWidths);
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}
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/*!
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* @function potentialMinimumForArray()
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* @abstract Calculate the minimum total for a given array of widths
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* @discussion The array is summed using, for each item, the minimum between the current value and the passed minimum value.
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* This is useful for getting a sum if the array has size-to-fit widths which will be allowed to be less than the
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* specified minimum.
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* @param An array of widths
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* @param The minimum
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* @returns The smallest possible sum for the array
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*/
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static NSInteger potentialMinimumForArray(NSArray *array, NSInteger minimum){
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NSInteger runningTotal = 0;
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NSInteger count = [array count];
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for(NSInteger i = 0; i < count; i++) {
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NSInteger currentValue = [[array objectAtIndex:i] integerValue];
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runningTotal += MIN(currentValue, minimum);
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}
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return runningTotal;
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}
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/*!
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@method _generateWidthsFromCells:
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@abstract Calculates the width of cells that would be visible.
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@discussion Calculates the width of cells in the tab bar and returns an array of widths for the cells that would be
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visible. Uses large blocks of code that were previously in PSMTabBarControl's update method.
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@param An array of PSMTabBarCells.
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@returns An array of numbers representing the widths of cells that would be visible.
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*/
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- (NSArray *)_generateWidthsFromCells:(NSArray *)cells {
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NSInteger cellCount = [cells count], i, numberOfVisibleCells = ([_control orientation] == PSMTabBarHorizontalOrientation) ? 1 : 0;
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NSMutableArray *newWidths = [NSMutableArray arrayWithCapacity:cellCount];
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id <PSMTabStyle> style = [_control style];
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CGFloat availableWidth = [_control availableCellWidth], currentOrigin = 0, totalOccupiedWidth = 0.0, width;
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NSRect cellRect = [_control genericCellRect], controlRect = [_control frame];
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PSMTabBarCell *currentCell;
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if([_control orientation] == PSMTabBarVerticalOrientation) {
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currentOrigin = [style topMarginForTabBarControl];
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}
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//Don't let cells overlap the add tab button if it is visible
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if([_control showAddTabButton]) {
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availableWidth -= [self addButtonRect].size.width;
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}
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for(i = 0; i < cellCount; i++) {
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currentCell = [cells objectAtIndex:i];
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// supress close button?
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[currentCell setCloseButtonSuppressed:((cellCount == 1 && [_control canCloseOnlyTab] == NO) ||
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[_control disableTabClose] ||
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([[_control delegate] respondsToSelector:@selector(tabView:disableTabCloseForTabViewItem:)] &&
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[[_control delegate] tabView:[_control tabView] disableTabCloseForTabViewItem:[currentCell representedObject]]))];
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if([_control orientation] == PSMTabBarHorizontalOrientation) {
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// Determine cell width
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if([_control sizeCellsToFit]) {
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width = [currentCell desiredWidthOfCell];
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if(width > [_control cellMaxWidth]) {
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width = [_control cellMaxWidth];
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}
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} else {
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width = [_control cellOptimumWidth];
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}
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width = ceil(width);
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//check to see if there is not enough space to place all tabs as preferred
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if(totalOccupiedWidth + width >= availableWidth) {
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//There's not enough space to add currentCell at its preferred width!
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//If we're not going to use the overflow menu, cram all the tab cells into the bar regardless of minimum width
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if(![_control useOverflowMenu]) {
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NSInteger j, averageWidth = (availableWidth / cellCount);
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numberOfVisibleCells = cellCount;
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[newWidths removeAllObjects];
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for(j = 0; j < cellCount; j++) {
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CGFloat desiredWidth = [[cells objectAtIndex:j] desiredWidthOfCell];
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[newWidths addObject:[NSNumber numberWithDouble:(desiredWidth < averageWidth && [_control sizeCellsToFit]) ? desiredWidth : averageWidth]];
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}
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totalOccupiedWidth = [[newWidths valueForKeyPath:@"@sum.intValue"] integerValue];
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break;
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}
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//We'll be using the overflow menu if needed.
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numberOfVisibleCells = i;
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if([_control sizeCellsToFit]) {
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BOOL remainingCellsMustGoToOverflow = NO;
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totalOccupiedWidth = [[newWidths valueForKeyPath:@"@sum.intValue"] integerValue];
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/* Can I squeeze it in without violating min cell width? This is the width we would take up
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* if every cell so far were at the control minimum size (or their current size if that is less than the control minimum).
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*/
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if((potentialMinimumForArray(newWidths, [_control cellMinWidth]) + MIN(width, [_control cellMinWidth])) <= availableWidth) {
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/* It's definitely possible for cells so far to be visible.
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* Shrink other cells to allow this one to fit
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*/
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NSInteger cellMinWidth = [_control cellMinWidth];
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/* Start off adding it to the array; we know that it will eventually fit because
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* (the potential minimum <= availableWidth)
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*
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* This allows average and minimum aggregates on the NSArray to work.
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*/
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[newWidths addObject:[NSNumber numberWithDouble:width]];
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numberOfVisibleCells++;
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totalOccupiedWidth += width;
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//First, try to shrink tabs toward the average. Tabs smaller than average won't change
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totalOccupiedWidth -= [self _shrinkWidths:newWidths
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towardMinimum:[[newWidths valueForKeyPath:@"@avg.intValue"] integerValue]
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withAvailableWidth:availableWidth];
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if(totalOccupiedWidth > availableWidth) {
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//Next, shrink tabs toward the smallest of the existing tabs. The smallest tab won't change.
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NSInteger smallestTabWidth = [[newWidths valueForKeyPath:@"@min.intValue"] integerValue];
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if(smallestTabWidth > cellMinWidth) {
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totalOccupiedWidth -= [self _shrinkWidths:newWidths
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towardMinimum:smallestTabWidth
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withAvailableWidth:availableWidth];
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}
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}
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if(totalOccupiedWidth > availableWidth) {
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//Finally, shrink tabs toward the imposed minimum size. All tabs larger than the minimum wll change.
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totalOccupiedWidth -= [self _shrinkWidths:newWidths
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towardMinimum:cellMinWidth
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withAvailableWidth:availableWidth];
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}
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if(totalOccupiedWidth > availableWidth) {
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NSLog(@"**** -[PSMTabBarController generateWidthsFromCells:] This is a failure (available %f, total %f, width is %f)",
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availableWidth, totalOccupiedWidth, width);
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remainingCellsMustGoToOverflow = YES;
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}
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if(totalOccupiedWidth < availableWidth) {
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/* We're not using all available space not but exceeded available width before;
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* stretch all cells to fully fit the bar
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*/
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NSInteger leftoverWidth = availableWidth - totalOccupiedWidth;
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if(leftoverWidth > 0) {
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NSInteger q;
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for(q = numberOfVisibleCells - 1; q >= 0; q--) {
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NSInteger desiredAddition = (NSInteger)leftoverWidth / (q + 1);
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NSInteger newCellWidth = (NSInteger)[[newWidths objectAtIndex:q] doubleValue] + desiredAddition;
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[newWidths replaceObjectAtIndex:q withObject:[NSNumber numberWithDouble:newCellWidth]];
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leftoverWidth -= desiredAddition;
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totalOccupiedWidth += desiredAddition;
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}
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}
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}
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} else {
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// stretch - distribute leftover room among cells, since we can't add this cell
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NSInteger leftoverWidth = availableWidth - totalOccupiedWidth;
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NSInteger q;
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for(q = i - 1; q >= 0; q--) {
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NSInteger desiredAddition = (NSInteger)leftoverWidth / (q + 1);
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NSInteger newCellWidth = (NSInteger)[[newWidths objectAtIndex:q] doubleValue] + desiredAddition;
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[newWidths replaceObjectAtIndex:q withObject:[NSNumber numberWithDouble:newCellWidth]];
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leftoverWidth -= desiredAddition;
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}
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remainingCellsMustGoToOverflow = YES;
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}
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// done assigning widths; remaining cells go in overflow menu
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if(remainingCellsMustGoToOverflow) {
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break;
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}
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} else {
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//We're not using size-to-fit
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NSInteger revisedWidth = availableWidth / (i + 1);
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if(revisedWidth >= [_control cellMinWidth]) {
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NSUInteger q;
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totalOccupiedWidth = 0;
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for(q = 0; q < [newWidths count]; q++) {
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[newWidths replaceObjectAtIndex:q withObject:[NSNumber numberWithDouble:revisedWidth]];
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totalOccupiedWidth += revisedWidth;
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}
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// just squeezed this one in...
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[newWidths addObject:[NSNumber numberWithDouble:revisedWidth]];
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totalOccupiedWidth += revisedWidth;
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numberOfVisibleCells++;
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} else {
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// couldn't fit that last one...
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break;
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}
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}
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} else {
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//(totalOccupiedWidth < availableWidth)
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numberOfVisibleCells = cellCount;
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[newWidths addObject:[NSNumber numberWithDouble:width]];
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totalOccupiedWidth += width;
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}
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} else {
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//lay out vertical tabs
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if(currentOrigin + cellRect.size.height <= controlRect.size.height) {
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[newWidths addObject:[NSNumber numberWithDouble:currentOrigin]];
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numberOfVisibleCells++;
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currentOrigin += cellRect.size.height;
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} else {
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//out of room, the remaining tabs go into overflow
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if([newWidths count] > 0 && controlRect.size.height - currentOrigin < 17) {
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[newWidths removeLastObject];
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numberOfVisibleCells--;
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}
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break;
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}
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}
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}
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//make sure there are at least two items in the horizontal tab bar
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if([_control orientation] == PSMTabBarHorizontalOrientation) {
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if(numberOfVisibleCells < 2 && [cells count] > 1) {
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PSMTabBarCell *cell1 = [cells objectAtIndex:0], *cell2 = [cells objectAtIndex:1];
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NSNumber *cellWidth;
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[newWidths removeAllObjects];
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totalOccupiedWidth = 0;
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cellWidth = [NSNumber numberWithDouble:[cell1 desiredWidthOfCell] < availableWidth * 0.5f ?[cell1 desiredWidthOfCell] : availableWidth * 0.5f];
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[newWidths addObject:cellWidth];
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totalOccupiedWidth += [cellWidth doubleValue];
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cellWidth = [NSNumber numberWithDouble:[cell2 desiredWidthOfCell] < (availableWidth - totalOccupiedWidth) ?[cell2 desiredWidthOfCell] : (availableWidth - totalOccupiedWidth)];
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[newWidths addObject:cellWidth];
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totalOccupiedWidth += [cellWidth doubleValue];
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if(totalOccupiedWidth < availableWidth) {
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[newWidths replaceObjectAtIndex:0 withObject:[NSNumber numberWithDouble:availableWidth - [cellWidth doubleValue]]];
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}
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numberOfVisibleCells = 2;
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}
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}
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return newWidths;
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}
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/*!
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@method _setupCells:withWidths
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@abstract Creates tracking rect arrays and sets the frames of the visible cells.
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@discussion Creates tracking rect arrays and sets the cells given in the widths array.
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*/
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- (void)_setupCells:(NSArray *)cells withWidths:(NSArray *)widths {
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NSUInteger i, tabState, cellCount = [cells count];
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NSRect cellRect = [_control genericCellRect];
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PSMTabBarCell *cell;
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NSTabViewItem *selectedTabViewItem = [[_control tabView] selectedTabViewItem];
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NSMenuItem *menuItem;
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[_overflowMenu release], _overflowMenu = nil;
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for(i = 0; i < cellCount; i++) {
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cell = [cells objectAtIndex:i];
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if(i < [widths count]) {
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tabState = 0;
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// set cell frame
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if([_control orientation] == PSMTabBarHorizontalOrientation) {
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cellRect.size.width = [[widths objectAtIndex:i] doubleValue];
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} else {
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cellRect.size.width = [_control frame].size.width;
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cellRect.origin.y = [[widths objectAtIndex:i] doubleValue];
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cellRect.origin.x = 0;
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}
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[_cellFrames addObject:[NSValue valueWithRect:cellRect]];
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//add tracking rects to arrays
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[_closeButtonTrackingRects addObject:[NSValue valueWithRect:[cell closeButtonRectForFrame:cellRect]]];
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[_cellTrackingRects addObject:[NSValue valueWithRect:cellRect]];
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if([[cell representedObject] isEqualTo:selectedTabViewItem]) {
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[cell setState:NSOnState];
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tabState |= PSMTab_SelectedMask;
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// previous cell
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if(i > 0) {
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[[cells objectAtIndex:i - 1] setTabState:([(PSMTabBarCell *)[cells objectAtIndex:i - 1] tabState] | PSMTab_RightIsSelectedMask)];
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}
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// next cell - see below
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} else {
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[cell setState:NSOffState];
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// see if prev cell was selected
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if((i > 0) && ([[cells objectAtIndex:i - 1] state] == NSOnState)) {
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tabState |= PSMTab_LeftIsSelectedMask;
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}
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}
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// more tab states
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if([widths count] == 1) {
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tabState |= PSMTab_PositionLeftMask | PSMTab_PositionRightMask | PSMTab_PositionSingleMask;
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} else if(i == 0) {
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tabState |= PSMTab_PositionLeftMask;
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} else if(i == [widths count] - 1) {
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tabState |= PSMTab_PositionRightMask;
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}
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[cell setTabState:tabState];
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[cell setIsInOverflowMenu:NO];
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// indicator
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if(![[cell indicator] isHidden] && ![_control isTabBarHidden]) {
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if(![[_control subviews] containsObject:[cell indicator]]) {
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[_control addSubview:[cell indicator]];
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[[cell indicator] startAnimation:self];
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}
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}
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// next...
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cellRect.origin.x += [[widths objectAtIndex:i] doubleValue];
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} else {
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[cell setState:NSOffState];
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[cell setIsInOverflowMenu:YES];
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[[cell indicator] removeFromSuperview];
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//position the cell well offscreen
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if([_control orientation] == PSMTabBarHorizontalOrientation) {
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cellRect.origin.x += [[_control style] rightMarginForTabBarControl] + 20;
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} else {
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cellRect.origin.y = [_control frame].size.height + 2;
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}
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[_cellFrames addObject:[NSValue valueWithRect:cellRect]];
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|
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if(_overflowMenu == nil) {
|
|
_overflowMenu = [[NSMenu alloc] init];
|
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[_overflowMenu insertItemWithTitle:@"" action:nil keyEquivalent:@"" atIndex:0]; // Because the overflowPupUpButton is a pull down menu
|
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[_overflowMenu setDelegate:self];
|
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}
|
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|
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// Each item's title is limited to 60 characters. If more than 60 characters, use an ellipsis to indicate that more exists.
|
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menuItem = [_overflowMenu addItemWithTitle:[[[cell attributedStringValue] string] stringWithEllipsisByTruncatingToLength:MAX_OVERFLOW_MENUITEM_TITLE_LENGTH]
|
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action:@selector(overflowMenuAction:)
|
|
keyEquivalent:@""];
|
|
[menuItem setTarget:_control];
|
|
[menuItem setRepresentedObject:[cell representedObject]];
|
|
|
|
if([cell count] > 0) {
|
|
[menuItem setTitle:[[menuItem title] stringByAppendingFormat:@" (%lu)", (unsigned long)[cell count]]];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
- (BOOL)menu:(NSMenu *)menu updateItem:(NSMenuItem *)menuItem atIndex:(NSInteger)index shouldCancel:(BOOL)shouldCancel {
|
|
if(menu == _overflowMenu) {
|
|
if([[[menuItem representedObject] identifier] respondsToSelector:@selector(icon)]) {
|
|
[menuItem setImage:[[[menuItem representedObject] identifier] valueForKey:@"icon"]];
|
|
}
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
- (NSInteger)numberOfItemsInMenu:(NSMenu *)menu {
|
|
if(menu == _overflowMenu) {
|
|
return [_overflowMenu numberOfItems];
|
|
} else {
|
|
NSLog(@"Warning: Unexpected menu delegate call for menu %@", menu);
|
|
return 0;
|
|
}
|
|
}
|
|
|
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@end
|
|
|
|
/*
|
|
PSMTabBarController will store what the current tab frame state should be like based off the last layout. PSMTabBarControl
|
|
has to handle fetching the new frame and then changing the tab cell frame.
|
|
Tab states will probably be changed immediately.
|
|
|
|
Tabs that aren't going to be visible need to have their frame set offscreen. Treat them as if they were visible.
|
|
|
|
The overflow menu is rebuilt and stored by the controller.
|
|
|
|
Arrays of tracking rects will be created here, but not applied.
|
|
Tracking rects are removed and added by PSMTabBarControl at the end of an animate/display cycle.
|
|
|
|
The add tab button frame is handled by this controller. Visibility and location are set by the control.
|
|
|
|
isInOverflowMenu should probably be removed in favor of a call that returns yes/no to if a cell is in overflow. (Not yet implemented)
|
|
|
|
Still need to rewrite most of the code in PSMTabDragAssistant.
|
|
*/
|